JS function as a link for a button

[MattIPv4]

Expected Behaviour

Within the documentation, it should be explained that the Link options can also be a JavaScript function instead of a URL string, which will be called when the user presses the button.

Current Behaviour

This is not documented and only shown through one example on the site (theme switching notification).

Development Environment

N/A

Steps to Reproduce

1. https://macosnotif.js.org

Context

#18

Additional Comments

N/A

[MattIPv4]

Reassigning to version 0.1.0, which will be our first minor release, ensuring all docs etc are good to go.